Manufacture of dies



(No Model.)

J. A. HOUSE. MANUFACTURE OF DIES.

ioirwemfor Jizmes A UNITED STATES JAMES ALFORD HOUSE, OF BRIDGEPORT,CONNECTICUT.

MANUFACTURE OF DIES.

SPECIFICATION forming part of Letters Patent No. 443,767, dated December30, 1890.

Application filed October 26, 1890. Serial No. 369,302. (No model.)

To all whom it may concern.-

Be it known that 1, JAMES ALFORD HOUSE, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and usefullinprovements in theMann facture of Dies; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to certain novel and useful improvements in themethod of producing dies, such as are used in connection with acutting-punch, in check-punches, and similar machines; and the object ofmy invention is to greatly simplify and cheapen the manufacture ofthese. dies, while at the same time producing a very perfect article;and with these ends in View my invention consists in the method and thesuccessive steps hereinafter fully explained, and then recited in theclaims.

In order that those skilled in the art to which my invention appertainsmay fully understand how the same is to be practiced, I will nowdescribe it in detail, reference being had to the accompanying drawings,forming a part of this specification, and in which Figure 1 is a planview showing a machine capable of producing dies in accordance with myprocess; Fig. 2, a perspective of the bar after receiving the impressionof the force; Fig. 3, a similar view showing said bar as partially cutthrough; Fig. 4, a section at the line a: x of Fig. (3; Fig. 5, a bottomplan view of the completed die, Fig. 6 a top plan of said die.

Like numerals and letters of reference de-' note the same parts in allthe figures.

1 represents a carriage mounted and adapt ed to slide upon ways 2,arranged 011 a suitable bed or base 3, and 4 is a screw having asuitable handle, whereby the feeding movements of said carriage areeffected. 5 is a seat or socket formed in said carriage, and 6 is afeeding-screw having bearings in the earriage and extending into thesocket, as is clearly shown at Fig. 1. Upon a suitable base 7 isarranged a longitudinallymovable force 8, provided with means, as acam-bearing lever 9, whereby it may be operated.

10 represents a shaft bearingaface-mill 11, behind which, upon a similarshaft, is a saw or mill 12. These two tools may be conveniently rotatedat proper speed by gears 13, to which power is applied by any ordinaryband-wheel 14. This machine forms no part of my present invention, andis merely incorporated in the drawings as an aid to a correctunderstanding of my process.

I first take a bar of soft steel A, which may be either square or ofother convenient section, and insert it in the socket 5 with its endsprojecting toward the force 8, the rear of said bar being supported bythe extremity of the screw 6. Then by means of the lever 9 the force isoperated against and into the end of the bar, so as to leave therein animpression B of the letter or figure borne upon the force, as seen atFig. 4, said impression being preferably of a depth of, say,one-sixteenth of an inch. The face of the force is tapered. Therefore.the impression will be tapered. The force is then withdrawn. The actionof the force will usually raise around the opening left thereby a slightbulge or swell upon the surface of the metal. This I remove by movingthe carriage backward, so that the end of the bar may be reduced to aplane surface by the action of the face-mill. A further feeding movementof the carriage brings the bar against the saw or cutter 12, whereby issevered from the end of said bar a thin slab or plate 0. The thicknessof this slab is determined by the depth of the impression made by theforce and is such that the path of the cutter intersects the inner endof the opening impressed by the force, whereby the slab or plate whensevered has an aperture therethro ugh corresponding with the impressedfigure, as is shown in Figs. 4:, 5, and (5, and constituting the die.After being severed this die may be dressed or polished, if required. Bythe screw 6 the bar may then be fed forward for the next operation. Itwill be readily understood that the width of the opening in the face ofthe finished die will depend somewhat upon the plane at which thesevering cut intersects the impression left by the force, as well as bythe thickness of the face of said force.

I do not wish to be limited to the precise steps herein set forth sincemy invention is predicated upon the broad idea of impressing into apiece of metal the figure desired and then removing a portion of saidmetal in such manner as to uncover and expose the inner end of therecess or impression made by said force.

I claim 1. The method of making dies, which consists in first forming animpression in apiece of metal and then removing a portion of said metal,so as to uncover and expose the inner end of the impression,substantially as set forth.

2. The method of making dies, which consists in first forming animpression in a piece of metal and then removing a portion of saidmetal, so that the slab or plate will be perforated with the figureimpressed, substantially as set forth.

JAMES ALFORD HOUSE.

Witnesses:

CHARLES H. .DHIOND, Janus CARR.

